Time-dependent identification systems, methods, and uses thereof

ABSTRACT

The present disclosure provides for identification systems and related methods of use. The disclosed identification systems can include a first ink and a second ink, each of which can comprise one or more time-dependent properties. The first and second inks can be disposed in a spatial pattern on a substrate. Illustrative spatial patterns include, but are not limited to, QR codes and other barcodes, text, images, and icons. A time-dependent property of the first ink and a time-dependent property of the second ink can cause a characteristic of the spatial pattern to change over time. For example, the spatial pattern can change from a first state at a first time to a second state at a second time. Evaluation and/or interpretation of the state of the spatial pattern at a second time can provide information about a product.

If an Application Data Sheet (ADS) has been filed on the filing date ofthis application, it is incorporated by reference herein. Anyapplications claimed on the ADS for priority under 35 U.S.C. §§119, 120,121, or 365(c), and any and all parent, grandparent, great-grandparent,etc. applications of such applications, are also incorporated byreference, including any priority claims made in those applications andany material incorporated by reference, to the extent such subjectmatter is not inconsistent herewith.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of the earliest availableeffective filing date(s) from the following listed application(s) (the“Priority Applications”), if any, listed below (e.g., claims earliestavailable priority dates for other than provisional patent applications,or claims benefits under 35 USC §119(e) for provisional patentapplications, for any and all parent, grandparent, great-grandparent,etc. applications of the Priority Application(s)).

PRIORITY APPLICATIONS

None.

If the listings of applications provided above are inconsistent with thelistings provided via an ADS, it is the intent of the Applicant to claimpriority to each application that appears in the DomesticBenefit/National Stage Information section of the ADS and to eachapplication that appears in the Priority Applications section of thisapplication.

All subject matter of the Priority Applications and of any and allapplications related to the Priority Applications by priority claims(directly or indirectly), including any priority claims made and subjectmatter incorporated by reference therein as of the filing date of theinstant application, is incorporated herein by reference to the extentsuch subject matter is not inconsistent herewith.

TECHNICAL FIELD

This disclosure relates to identification systems, methods, and usesthereof. Specifically, this disclosure relates to identification systemsthat include time-dependent inks.

SUMMARY

The present disclosure is related to identification systems, methods,and uses thereof. As detailed below, the identification systems cancomprise a plurality of inks comprising time-dependent properties. Theplurality of time-dependent inks can be disposed in a spatial pattern ona substrate. Illustrative spatial patterns include, but are not limitedto, QR codes and other barcodes, text, images, and icons. Thetime-dependent properties of the inks can cause a characteristic of thespatial pattern to change over time. For example, the spatial patterncan change from a first state at a first time to a second state at asecond time. Interpretation of the spatial pattern in the second stateand/or at a second time can provide identifying information about thespatial pattern and/or a product associated therewith.

Various characteristics of the time-dependent inks and/or the spatialpattern can change over time, including, but not limited to, color,reflectivity, and location. For example, the time-dependent inks canchange from visible colors to other visible colors, non-visible colorsto other non-visible colors, or visible colors to non-visible colors,and vice versa. The reflectivity of the time-dependent inks and/or thespatial pattern can also change. The location of the time-dependent inksand/or the spatial pattern can also change from location to another.

In some embodiments, the characteristics of the time-dependent inks canchange due to an atmospheric reaction. For example, the characteristicsof the time-dependent inks can change due to oxidation reactions and/orevaporation reactions. In other embodiments, the characteristics of thetime-dependent inks can change due to chemical reactions comprising oneor more components of the inks.

Information can be derived from the spatial pattern at any time. Forexample, information can be determined by evaluating and/or interpretingthe state of the spatial pattern at a given time. Interpretation of thespatial pattern can be accomplished by visual inspection of the spatialpattern. For example, the spatial pattern can be viewed and/or comparedwith a control or standard image. Interpretation of the spatial patternalso can be accomplished by a computing device, such as a smart phone.For example, a computing device can scan or capture an image of thespatial pattern, submit the spatial pattern to a website, and provideidentifying information about the spatial pattern and/or a productassociated therewith.

In certain embodiments, the spatial pattern can be evaluated todetermine whether the spatial pattern is authentic. In some embodiments,a date can be encoded in the spatial pattern. The date can correspond tovarious events, including, but not limited to, the date on which theinks were disposed on the substrate, the manufacturing date of aproduct, the packaging date of the product, and an expiration date of aproduct. Other dates and/or information can also be encoded in thespatial pattern.

In some embodiments, the spatial pattern further comprises one or morereference inks. The reference inks can be static inks, or inks that aresubstantially devoid of time-dependent properties. The reference inkscan be used as a baseline reference for interpreting the characteristicchange of the time-dependent inks. In some embodiments, the referenceinks can include temperature calibration inks. The reference inks canalso include anti-counterfeiting characteristics. These and otherembodiments are described in detail below.

The foregoing summary is illustrative only and is not intended to be inany way limiting. In addition to the illustrative aspects, embodiments,and features described above, further aspects, embodiments, and featureswill become apparent by reference to the drawings and the followingdetailed description.

BRIEF DESCRIPTION OF THE FIGURES

FIGS. 1A-1B are schematic illustrations of an identification system,according to an embodiment of the present disclosure.

FIGS. 2A-2B are schematic illustrations of an identification system,according to another embodiment of the present disclosure.

FIGS. 3A-3B are schematic illustrations of an identification system,according to another embodiment of the present disclosure.

FIG. 4 is a schematic illustration of an identification system,according to another embodiment of the present disclosure.

FIGS. 5A-5B are schematic illustrations of an identification system,according to another embodiment of the present disclosure.

FIGS. 6A-6B are schematic illustrations of an identification system,according to another embodiment of the present disclosure.

DETAILED DESCRIPTION

In the following detailed description, reference is made to theaccompanying drawings, which form a part hereof. In the drawings,similar symbols typically identify similar components, unless contextdictates otherwise. The illustrative embodiments described in thedetailed description, drawings, and claims are not meant to be limiting.Other embodiments may be utilized, and other changes may be made,without departing from the spirit or scope of the subject matterpresented here.

Thus, the following detailed description of the embodiments of thesystems and methods of the disclosure is not intended to limit the scopeof the disclosure, as claimed, but is merely representative of possibleembodiments. In addition, the steps of a method do not necessarily needto be executed in any specific order, or even sequentially, nor do thesteps need to be executed only once.

The present disclosure is related to identification systems, methods,and uses thereof. As detailed below, the identification systems cancomprise a plurality of inks comprising time-dependent properties. Theplurality of time-dependent inks can be disposed in a spatial pattern ona substrate. Illustrative spatial patterns include, but are not limitedto, QR codes and other barcodes, text, images, and icons. Thetime-dependent properties of the inks can cause a characteristic of thespatial pattern to change over time. For example, the spatial patterncan change from a first state at a first time to a second state at asecond time. Interpretation of the spatial pattern in the second stateand/or at a second time can provide identifying information about thespatial pattern and/or a product associated therewith. In somecircumstances, the presence of a time varying spatial pattern can makean identification system harder to counterfeit, as a simple staticcounterfeit pattern can only be “correct” at a single time, and a“successful” counterfeit must match not only a single value of thespatial pattern, but its time dependent progression as well.

Various characteristics of the time-dependent inks and/or the spatialpattern can change over time, including, but not limited to, color,reflectivity, and location. For example, the time-dependent inks canchange from visible colors to other visible colors, non-visible colorsto other non-visible colors, or visible colors to non-visible colors,and vice versa. The reflectivity of the time-dependent inks and/or thespatial pattern can also change. The location of the time-dependent inksand/or the spatial pattern can also change from location to another.

In some embodiments, the characteristics of the time-dependent inks canchange due to an atmospheric reaction. For example, the characteristicsof the time-dependent inks can change due to oxidation reactions and/orevaporation reactions. In other embodiments, the characteristics of thetime-dependent inks can change due to chemical reactions comprising oneor more components of the inks.

Information can be derived from the spatial pattern at any time. Forexample, information can be determined by evaluating and/or interpretingthe state of the spatial pattern at a given time. Interpretation of thespatial pattern can be accomplished by visual inspection of the spatialpattern. For example, the spatial pattern can be viewed and/or comparedwith a control or standard image. Interpretation of the spatial patternalso can be accomplished by a computing device, such as a smart phone.For example, a computing device can scan or capture an image of thespatial pattern, submit the spatial pattern to a website, and provideidentifying information about the spatial pattern and/or a productassociated therewith. In some embodiments, the website can compare thereceived spatial pattern to a database or program determination of whatthe spatial pattern should be (e.g., given the image date, the printingdate, the ink characteristics, etc.) and provide a determination as towhether the marked item is counterfeit or not.

In certain embodiments, the spatial pattern can be evaluated todetermine whether the spatial pattern is authentic. In some embodiments,a date can be encoded in the spatial pattern. The date can correspond tovarious events, including, but not limited to, the date on which theinks were disposed on the substrate, the manufacturing date of aproduct, the packaging date of the product, and an expiration date of aproduct. Other dates and/or information can also be encoded in thespatial pattern.

In some embodiments, the spatial pattern further comprises one or morereference inks. The reference inks can be static inks, or inks that aresubstantially devoid of time-dependent properties. The reference inkscan be used as a baseline reference for interpreting the characteristicchange of the time-dependent inks. In some embodiments, the referenceinks can include temperature calibration inks. The reference inks canalso include anti-counterfeiting characteristics. These and otherembodiments are described in detail below.

FIGS. 1A-1B are schematic illustrations of an identification system 100,according to an embodiment of the present disclosure. As shown in FIGS.1A-1B, the identification system 100 can comprise a plurality of inks112, 114 disposed in a spatial pattern 110 on a substrate 102. Forexample, in the illustrated embodiment, the identification system 100comprises a first ink 112 and a second ink 114. Additional inks (e.g.,third, fourth, fifth, etc.) can also be used. The inks 112, 114 can eachcomprise one or more time-dependent properties. Time-dependentproperties are properties that vary or change as a function of time. Insuch embodiments, the inks 112, 114 can be referred to as time-dependentinks 112, 114.

In some embodiments, the time-dependent properties of the inks 112, 114are different. For example, a time-dependent property of a first ink 112can differ from a time-dependent property of a second ink 114. In suchembodiments, one portion of the spatial pattern 110 can change over timedifferently than another portion of the spatial pattern 110. In otherembodiments, the time-dependent properties of the inks 112, 114 aresubstantially the same. In still other embodiments, at least onetime-dependent property of a first ink 112 differs from at least onetime-dependent property of a second ink 114, and at least onetime-dependent property of the first ink 112 is substantially the sameas at least one time-dependent property of the second ink 114.

The time-dependent properties of the inks 112, 114 each can comprise, orotherwise be associated with, a rate of progression. The rate ofprogression is the rate at which a time-dependent property changes as afunction of time (e.g., change/time (seconds, minutes, hours, days,years, etc.)). In some embodiments, the rate of progression of thetime-dependent properties of the inks 112, 114 is known. For example,the rate of progression can be known at specified conditions (e.g.,temperatures and pressures), including, but not limited to, StandardTemperature and Pressure Conditions (“STP”) (0° C. and 100 kPa) andStandard Ambient Temperature and Pressure Conditions (“SATP”) (25° C.and 100 kPa). The rate of progression can also be known, or otherwisederived for, other conditions. As can be appreciated, the rate ofprogression can be relatively fast, or relatively slow as desired.

In some embodiments, a known rate of progression can be used to identifyor otherwise determine information about the inks 112, 114 and/or thespatial pattern 110. For example, by knowing the rate of progression,the inks 112, 114 and/or the spatial pattern 110 can be analyzed orotherwise evaluated at any given time to determine the date on which theink 112, 114 and/or the spatial pattern 110 was disposed on thesubstrate 102. Other information about the inks 112, 114 and/or thespatial pattern 110 can also be derived by knowing the rate ofprogression, as detailed below.

In some embodiments, the rate of progression of the time-dependentproperties of the inks 112, 114 is different. For example, the rate ofprogression of a time-dependent property of a first ink 112 can differfrom the rate of progression of a time-dependent property of a secondink 114. In other embodiments, the rate of progression of thetime-dependent properties of the inks 112, 114 is substantially thesame. In still other embodiments, the rate of progression of at leastone time-dependent property of a first ink 112 differs from the rate ofprogression of at least one time-dependent property of a second ink 114,and the rate of progression of at least one time-dependent property ofthe first ink 112 is substantially the same as the rate of progressionof at least one time-dependent property of the second ink 114.

In some embodiments, the rate of progression of the time-dependentproperties of the inks 112, 114 is variable or otherwise capable ofbeing varied or changed. For example, the rate of progression of atime-dependent property of an ink 112, 114 can be configured to berelatively fast, or relatively slow, depending on the desired use of theidentification system 100. For instance, if an identification system 100is used to authenticate a product being mailed, a relatively fast rateof progression may be desired. If an identification system 100 is usedto authenticate currency or indicate that a product has expired, arelatively slow rate of progression may be desired.

The rate of progression of the time-dependent properties of the ink 112,114 can be varied by modifying one or more components of the ink 112,114. For example, one or more reagents or other compounds can be addedthat can accelerate or decelerate the rate of progression. In someembodiments, the one or more components of the ink 112, 114 can bemodified prior to disposing the ink 112, 114 on the substrate 102. Inother embodiments, the one or more components of the ink 112, 114 aremodified while the ink 112, 114 is being disposed on the substrate 102.For example, one or more components of the ink 112, 114 can be mixedwith additional reagents or compounds while the ink 112, 114 is beingdisposed on the substrate 102. In yet other embodiments, one or morecomponents of the ink 112, 114 can be modified after the ink 112, 114has been disposed on the substrate 102. For example, a reagent or othercompound can be applied to an ink 112, 114 that has previously beendisposed on a substrate 102.

As can be appreciated, varying the rate of progression of atime-dependent property of an ink 112, 114 can vary the rate of changeof a particular characteristic of the ink 112, 114 and/or the spatialpattern 110. For example, increasing the rate of progression of atime-dependent property of an ink 112, 114 can increase the rate ofchange of a characteristic of the ink 112, 114 and/or the spatialpattern 110. Analogously, decreasing the rate of progression of atime-dependent property of an ink 112, 114 can decrease the rate ofchange of a characteristic of the ink 112, 114 and/or the spatialpattern 110. In some embodiments, the rate of progression can be varied,or otherwise configured, such that a characteristic of an ink 112, 114and/or the spatial pattern 110 changes to a particular state on apredetermined date, for example, to authenticate a product or indicatethat an expiration date has passed.

In some embodiments, the time-dependent properties of the inks 112, 114can be described in relation to a characteristic change that is takingplace with the ink 112, 114 and/or the spatial pattern 110. Inparticular, the time-dependent properties of the inks 112, 114 can causevarious characteristics of the inks 112, 114 and/or the spatial pattern110 to change over time. For example, a time-dependent property of anink 112, 114 can cause a characteristic of an ink 112, 114 and/or thespatial pattern 110 to change from one state at a first time to anotherstate at a second time. For convenience, a first time and a second timecan be used to reference and distinguish between two different times.However, it will be appreciated that the first time and the second timeare not intended to be limiting in any way. For example, the first timeand second time are not associated with any fixed date or event, but canbe representative of any time. In some embodiments, the first time canbe representative of the time at which the inks 112, 114 were disposedon the substrate 102.

Additionally, throughout this disclosure, reference may be made to aparticular state (e.g., first, second, third, fourth, etc.). Forexample, reference may be made to a spatial pattern 110 being in a firststate at a first time and a second state at a second time. Analogously,reference may also be made to a first ink 112 being in a third state atthe first time and a fourth state at the second time, and reference maybe made to the second ink 114 being in a fifth state at the first timeand a sixth state at the second time. The recitation of particularstates may be merely used to differentiate between other states (e.g., astate of the spatial pattern 110, a state of the first ink 112, and astate of a second ink 114), and is not intended to be limiting in anyway. For example, the recitation of a particular state is not intendedto indicate the existence of other states. Thus, recitation of a thirdstate does not indicate the existence of a first, second, or fourthstate, etc. And the recitation of a state is not intended to indicatethat the ink 112, 114 and/or spatial pattern 110 is in a fixed state.Rather, the recitation of a state is merely indicative of the currentstate of an ink 112, 114 and/or the spatial pattern 110 at a particulartime, and the ink 112, 114 and/or the spatial pattern 110 can continueto change as time progresses.

It will also be appreciated that reference to a particular state neednot be mentioned. For example, discussion of an ink 112, 114 and/or thespatial pattern 110 at a particular time can imply that the ink 112, 114and/or the spatial pattern 110 is in a particular state. For example,discussion of an ink 112, 114 and/or the spatial pattern 110 at a firsttime or second time can imply that the ink 112, 114 and/or the spatialpattern in is one state at the first time and another state at thesecond time. Thus, changes in the ink 112, 114 and/or the spatialpattern 110 from one time to another can also imply changes from onestate to another state.

Illustrative changes to characteristics of the inks 112, 114 and/or thespatial pattern 110 over time are depicted in FIGS. 1A-1B. In FIG. 1A,the inks 112, 114 and the spatial pattern 110 are depicted at a firsttime. At the first time, the spatial pattern 110 a can be described asbeing in a first state, the first ink 112 a can be described as being ina third state, and the second ink 114 a can be described as being in afifth state. The time-dependent properties of the inks 112, 114 causethe inks 112, 114 and the spatial pattern 110 to change as timeprogresses, as depicted in FIG. 1B. At the second time, depicted in FIG.1B, the spatial pattern 110 b can be described as being in a secondstate, the first ink 112 b can be described as being in a fourth state,and the second ink 114 b can be described as being in a sixth state. Ascan be appreciated, and as also shown in FIGS. 1A-1B, the spatialpattern 110, which comprises the inks 112, 114, can change from onestate to another state (e.g., a first state to a second state) as theinks 112, 114 change from one state to another state (e.g., a thirdstate to a fourth state, and a fifth state to a sixth state). Thus, anydisclosure herein relating to the inks 112, 114 individually is alsoapplicable to the spatial pattern 110 or at least a portion of thespatial pattern 110.

Illustrative characteristics of the inks 112, 114 and/or the spatialpattern 110 that can be affected and/or changed by the time-dependentproperties of the inks 112, 114 include, but are not limited to, color,reflectivity, and location. For example, in one embodiment, acharacteristic of an ink 112, 114 and/or spatial pattern 110 that isaffected by the time-dependent property of the ink 112, 114 comprisescolor. Specifically, the color of an ink 112, 114 can change from onecolor at the first time to another color at the second time.

In some embodiments, the color of at least one ink 112, 114 changes fromone visible color to another visible color. Typically, a visible coloris a color that is in the spectrum (i.e., visible spectrum) that can bedetected by the human eye. The visible spectrum typically includeswavelengths between about 390 nm and about 700 nm, but other wavelengthsvisible to the human eye can also be included. In other embodiments, thecolor of at least one ink 112, 114 changes from a non-visible color toanother non-visible color. Non-visible colors include infraredwavelengths (e.g., greater than about 700 nm) and ultravioletwavelengths (e.g., less than about 390 nm). In yet another embodiment,the color of at least one ink 112, 114 changes from one visible color toa non-visible color, or vice versa.

Combinations of the above-mentioned color changes are also contemplated.For example, in further embodiments, the color of one ink 112, 114changes from one visible color to another visible color, and the colorof another ink 112, 114 changes from one non-visible color to anothernon-visible color. In other embodiments, the color of each ink 112, 114changes from one visible color to another visible color, or the color ofeach ink 112, 114 changes from one non-visible color to anothernon-visible color. In still further embodiments, the color of one ink112, 114 changes from one visible color to a non-visible color (or viceversa), and the color of another ink 112, 114 changes from one visiblecolor to another visible color (or one non-visible color to anothernon-visible color).

In another embodiment, a characteristic of the ink 112, 114 and/orspatial pattern 110 that is affected by the time-dependent properties ofthe inks 112, 114 comprises reflectivity. For example, the reflectivityof an ink 112, 114 can change from one reflectivity at a first time toanother reflectivity at a second time. In some embodiments, thereflectivity of an ink 112, 114 increases over time. In otherembodiments, the reflectivity of an ink 112, 114 decreases over time. Inother words, the reflectivity of an ink 112, 114 at a first time can begreater than the reflectivity of the ink 112, 114 at a second time, andvice versa. Changes in reflectivity can manifest as an overallbrightening of the ink 112, 114 (e.g., increasing reflectivity), or anoverall fading of the ink 112, 114 (e.g., decreasing reflectivity). Inparticular embodiments, the reflectivity of an ink 112, 114 changes fromone polarization (or polarization dependence) at a first time to anotherpolarization (or polarization dependence) at a second time.

The reflectivity can comprise various components, including, but notlimited to, specular and diffuse components, that can change over time.For example, in some embodiments, a specular component (or specularreflection) of the reflectivity at a first time is greater than thespecular component (or specular reflection) of the reflectivity at asecond time. In other embodiments, a specular component (or specularreflection) of the reflectivity at a first time is less than thespecular component (or specular reflection) of the reflectivity at asecond time. In other words, the specular component of the reflectivity(e.g., a first reflectivity) of an ink 112, 114 at a first time can begreater than the specular component of the reflectivity (e.g., a secondreflectivity) of an ink 112, 114 at a second time, and vice versa.Analogously, the diffuse component of the reflectivity of an ink 112,114 at a first time can be greater than the diffuse component of thereflectivity of an ink 112, 114 at a second time, and vice versa.

The reflectivity can also be described as including a refractivity orrefractive component. The refractivity, or refractive component, canalso be quantified by itself, independent of the reflectivity. Therefractivity, or refractive component of an ink 112, 114 can change overtime. For example, the refractivity of an ink 112, 114 can comprise onerefractivity at a first time and another refractivity at a second time.More specifically, the refractivity (e.g., a first refractivity) of anink 112, 114 at a first time can be greater than the refractivity (e.g.,a second refractivity) of the ink 112, 114 at a second time. In otherembodiments, the refractivity of an ink 112, 114 at a first time can beless than the refractivity of the ink 112, 114 at a second time.

The diffractive component of the ink 112, 114 can also change in ananalogous manner. For example, the diffractive component of an ink 112,114 at a first time can be greater than the diffractive component of theink 112, 114 at a second time. And in other embodiments, the diffractivecomponent of an ink 112, 114 at a first time can be less than thediffractive component of the ink 112, 114 at a second time. Examples ofinks with diffractive components can be seen in U.S. Pat. No. 5,912,767,titled ‘Diffractive Indicia for a Surface,’ filed Nov. 23, 1994, andU.S. Pat. No. 7,729,026, titled ‘Security Device with Metameric FeaturesUsing Diffractive Pigment Flakes,’ filed Dec. 12, 2006, each of which isincorporated by reference in its entirety.

In yet another embodiment, a characteristic of the ink 112, 114 that isaffected by the time-dependent property comprises location, e.g., aspatial location in the spatial pattern 110 on the substrate 102. Forexample, a portion of the ink 112, 114 can be disposed at one locationat a first time, and another location at a second time, as detailedbelow.

The characteristic changes of the inks 112, 114 can be caused by manythings. For example, in some embodiments, the characteristic change ofthe inks 112, 114 can be caused by, or otherwise attributed to, one ormore reactions. Illustrative reactions include, but are not limited to,atmospheric reactions and chemical reactions. In some embodiments, thereactions can progress relatively slowly over time such that the ink112, 114 appears to change indefinitely. In other embodiments, thereactions can progress relatively quickly.

In certain embodiments, the characteristic of ink 112, 114 changes dueto an atmospheric reaction comprising one or more components of the ink112, 114. Illustrative types of atmospheric reactions include, but arenot limited to, oxidation reactions and evaporation reactions. Forexample, U.S. Pat. No. 5,759,246, titled ‘Ink with Time DependentCharacteristics,’ filed Dec. 17, 1996, which is incorporated byreference in its entirety, discusses a variety of inks which changecolor due to pH shifts caused by the evaporation of one component of theink. One example of such an ink involves a phenolsulfonphthalein dye(phenol red) whose color changes from red to yellow depending on pH. ThepH can be determined by a solvent in the ink; for instance,triethanolamine is an alkaline solvent that slowly evaporates, changingthe ink's pH and hence its color from red to yellow. This patent discussa variety of dyes and solvents involving different color shiftsoccurring over different time scales. U.S. Pat. No. 5,759,246 alsodiscusses a variety of inks which change color due to oxidation. Oneexample of such an ink involves a combination of an unstable dye such asrhodamine B in a stable solvent such copper phthalocyanine. For example,in some embodiments, the ink 112, 114 can oxidize by interacting withthe air, or components (e.g., oxygen) in the air. In other embodiments,the characteristic of the ink 112, 114 can change as portions of the ink112, 114 evaporate. For example, liquid components of the ink 112, 114can evaporate or otherwise vaporize, causing a characteristic of the ink112, 114 to change.

In various embodiments, the characteristics of the ink 112, 114 changedue to a chemical reaction comprising one or more components of the ink112, 114. Examples of such reactions for use in color changing inks canbe found in European Patent Application No. EP 0 117 390, titled‘Process for Monitoring Incremental Environmental Exposures of Productsthat Undergo Progressive Quality Changes in Response to EnvironmentStimuli,’ filed Jan. 3, 1984, which is incorporated by reference in itsentirety, based on diacetylene materials; International PatentPublication No. WO 1999039197, titled ‘Substrate for PackagingPerishable Goods or for Application onto Same and Method for Determiningthe Quality of Said Goods,’ filed Jan. 27, 1999, which is incorporatedby reference in its entirety, describing a reversible indicator havingphotochromic properties based on transfer reactions; and U.S. Pat. No.7,754,273, titled ‘Method of Printing a Time-Temperature Indicator Basedon Azo Coupling Reactions onto a Susbtrate [sic],’ filed Aug. 3, 2005,which is incorporated by reference in its entirety, based on azocoupling reactions. For example, a chemical reaction can comprise areaction between a first component of an ink 112, 114 and a secondcomponent of the ink 112, 114. U.S. Pat. No. 7,255,508, titled ‘WritingSystem and Ink Pen Having Time-Dependent Characteristics,’ filed Dec. 7,2005, which is incorporated by reference in its entirety, discusses anumber of such inks, some of which involve mixtures of oxidizer andreducer components. In some embodiments, the components (e.g., first andsecond components) are mixed together prior to being disposed in aspatial pattern 110 on the substrate 102. In other embodiments, thecomponents can be mixed together while being disposed in the spatialpattern 110 on the substrate 102. In yet other embodiments, thecomponents can mix or otherwise interact with each other after they aredisposed on the substrate 102, or as they are disposed on the substrate102. For example, the components of the ink 112, 114 can be disposed atsubstantially similar locations (e.g., pixel locations) on the substrate102, such that they interact with one another on the substrate 102. Thecomponents of the ink 112, 114 can also be disposed at adjacentlocations on the substrate 102 such that they interact with each otherafter being disposed on the substrate 102. For example, a firstcomponent of an ink 112, 114 can be disposed at a first location on thesubstrate 102 and a second component of the ink 112, 114 can be disposedat a second location on the substrate 102 that is adjacent to the firstlocation such that the first and second components of the ink 112, 114interact with each other on the substrate 102.

In other embodiments, the characteristics of the ink 112, 114 change dueto a chemical reaction comprising one or more components of a first ink112 and one or more components of a second ink 114. The components ofthe inks 112, 114 can be mixed together prior to being disposed in aspatial pattern 110 on the substrate 102. In other embodiments, thecomponents of the inks 112, 114 can be mixed together while beingdisposed in the spatial pattern 110 on the substrate 102. In yet otherembodiments, the components of the inks 112, 114 can mix or otherwiseinteract with each other after they are disposed on the substrate 102,or as they are disposed on the substrate 102. For example, thecomponents of the inks 112, 114 can be disposed at substantially similarlocations (e.g., pixel locations) on the substrate 102, such that theyinteract with one another on the substrate 102. The components of theinks 112, 114 can also be disposed at adjacent locations on thesubstrate 102 such that they interact with each other after beingdisposed on the substrate 102. For example, a component of a first ink112 can be disposed at a first location on the substrate 102 and acomponent of a second ink 114 can be disposed at a second location onthe substrate 102 that is adjacent to the first location such that thecomponents of the first and second inks 112, 114 interact with eachother on the substrate 102.

In still other embodiments, the characteristic of the ink 112, 114changes due to a chemical reaction between one or more components of theink 112, 114 and a component of the substrate 102. For example, acomponent of the ink 112, 114 can interact with a component of thesubstrate 102 after being disposed on the substrate 102.

In some embodiments, the characteristic of the ink 112, 114 beginschanging the moment the ink 112, 114 is disposed on the substrate 102.In other embodiments, the characteristic of the ink 112, 114 beginschanging before the ink 112, 114 is disposed on the substrate 102. Inyet other embodiments, the characteristic of the ink 112, 114 beginschanging at a specified time (or event) after the ink 112, 114 has beendisposed on the substrate 102. For example, in some embodiments, a sealmay be used to cover the ink 112, 114, which can be disposed on asubstrate 102, until a specified time (or event) (e.g., a packagingdate, a shipping date, etc.). At the specified time (or event) (e.g.,the packaging date, a shipping date, etc.), the seal may be removed fromthe ink 112, 114, or otherwise broken, causing the characteristic of theink 112, 114 to begin changing at the specified time (or event) (e.g.,the packaging date, the shipping date, etc.). For example, the ink 112,114 can begin changing due to an atmospheric reaction (e.g., reactionwith oxygen, air, water vapor, etc.) after the seal has been removed orotherwise broken. In such embodiments, the seal can comprise a thinplastic film or other covering that can protect the ink 112, 114 fromreacting or otherwise changing prior to the specified time (or event)(e.g., the packaging date, the shipping date, etc.). As can beappreciated, the specified time (or event) can be any time at the user'sdiscretion.

Other methods of delaying the change in the characteristic of the ink112, 114 can also be used. For example, in some embodiments, the ink112, 114 can be disposed on the substrate 102 in a dry powder form. At aspecified time (or event) (e.g., a packaging date, a shipping date,etc.), the ink 112, 114 can be dipped into a liquid, or a liquid can beapplied to the ink 112, 114, causing the characteristic of the ink 112,114 to begin changing. In still other embodiments, a reagent (e.g., aliquid reagent) can be applied to an ink 112, 114 at a specified time(or event) (e.g., a packaging date, a shipping date, etc.), causing thecharacteristic of the ink 112, 114 to begin changing. In suchembodiments, the liquid or reagent can be held in a separate reservoiruntil being released or applied onto the ink 112, 114.

Delaying the time-dependent property, or characteristic change, of theink 112, 114 can be useful in many instances. For example, delaying thetime-dependent property, or characteristic change, of the ink 112, 114can be useful in situations where the ink 112, 114 is disposed on thesubstrate 102 prior to, for example, shipping, packaging, delivering, ormanufacturing a product. For example, in some embodiments, a product maybe packaged long before it is shipped or delivered. In another example,the ink 112, 114 may be disposed on a substrate 102 used for packagingprior to placing a product in the package. In other embodiments, onecompany may dispose the ink 112, 114 onto a substrate 102, and anothercompany may use the substrate 102 to label (or package) their product.As can be appreciated, other situations are also contemplated.

In some embodiments, the inks 112, 114 can comprise known time- andtemperature-related information. In such embodiments, information aboutthe temperature of the inks 112, 114 can be derived from evaluation of acharacteristic of the ink 112, 114 at a second time. For example, insome embodiments, evaluation and/or interpretation of the state of thecharacteristic of an ink 112, 114 at a second time can provideinformation about whether the temperature of the ink 112, 114 and/or thespatial pattern 110 exceeded a threshold temperature between the firsttime and the second time. For example, in some embodiments, evaluationand/or interpretation of a characteristic of the ink 112, 114 providesinformation about whether the temperature of the ink 112, 114 was heatedabove a threshold temperature. In other embodiments, evaluation and/orinterpretation of a characteristic of the ink 112, 114 providesinformation about whether the temperature of the ink 112, 114 was cooledbelow a threshold temperature. As can be appreciated, any of theabove-mentioned characteristics of the inks 112, 114 can change when athreshold temperature has been exceeded, including, for example, thecolor of the ink 112, 114.

In some embodiments, the temperature-related information derived fromthe inks 112, 114 can provide calibration information for interpretingchanges to the spatial pattern 110. For example, temperature-relatedinformation and/or calibration information can provide a baseline fordifferentiating between changes in the spatial pattern 110 that arecaused by temperature (or temperature fluctuations) and changes that arecaused by time.

Temperature-related information can be derived from the inks 112, 114 invarious ways. For example, a computing device can evaluate the state ofa characteristic of the ink 112, 114 at a second time and isolatetemperature-related information from the ink 112, 114. Thetemperature-related information can then be subtracted from the changein the spatial pattern 110, minimizing the effects of temperature on thechanges to the spatial pattern 110. In some embodiments, a temperaturestable ink can be employed by combining two inks having oppositetemperature coefficients for at least one specified characteristic(e.g., color or reflectivity). The specified characteristic of this inkwill vary with respect to time, but not with temperature, (within aspecified range of temperatures). One or more reference inks can also beused to derive a baseline and/or temperature-related information, asdetailed below.

The plurality of inks 112, 114 can be disposed on various substrates102, including, but not limited to, packaging materials, labels,pharmaceutical medications, legal documents, confidential documents,currency, lottery tickets, and products and/or portions of products oritems. The plurality of inks 112, 114 can also be disposed on thesubstrate 102 in various ways. For example, the plurality of inks 112,114 can be printed on the substrate 102. The plurality of inks 112, 114can also be stamped onto the substrate. Other ways of disposing theplurality of inks 112, 114 on the substrate 102 can also be employed.

The plurality of inks 112, 114 can also be disposed in various spatialpatterns 110 on the substrate 102. In some embodiments, the spatialpattern 110 is a predetermined pattern. In the predetermined pattern, afirst ink 112 (or a portion thereof) can be disposed at a first locationon the substrate 102, and a second ink 114 (or a portion thereof) can bedisposed at a second location on the substrate 102. The first and secondlocations can be different. For example, the first location and thesecond location can be at different pixel locations. In otherembodiments, the first and second locations can be at a substantiallysimilar location (e.g., similar pixel location). In such embodiments,any difference between the first and second locations can be minimaland/or non-resolvable by visual inspection by a human.

In some embodiments, the spatial pattern 110 can be machine readable.For example, the spatial pattern 110 can be scanned and/or photographed.The spatial pattern 110 can be scanned and/or photographed with varioustypes of computing devices, including, but not limited to, scanners andsmart phones.

In some embodiments, such as the illustrated embodiment of FIGS. 1A-1B,the spatial pattern 110 can comprise a quick response code (i.e., QRcode). Other spatial patterns 110 are also contemplated, including, butnot limited to, various types of other barcodes (e.g., one-dimensionalbarcodes, two-dimensional barcodes, linear barcodes, universal productcodes (i.e., UPC), matrix barcodes, etc.), text, images, and icons.Other spatial patterns 110 are also contemplated.

In some embodiments, the spatial pattern 110 is unique, or the spatialpattern 110 comprises a unique pattern. A unique pattern (or a uniquespatial pattern 110) can comprise a randomized arrangement of inks 112,114 on the substrate 102. For example, the randomized arrangement ofinks 112, 114 can comprise a randomized arrangement of color on apixel-by-pixel basis through a portion of the spatial pattern 110.Pixels can refer to discrete units of ink disposed on discrete areas ofa substrate 102. In some embodiments, the randomized arrangement of theinks 112, 114 can comprise a randomized arrangement of time-progressioncharacteristics on a pixel-by-pixel basis throughout a portion of thespatial pattern 110. In still other embodiments, the unique pattern (orunique spatial pattern 110) can be unique to each printing.

If desired, one or more dates (e.g., time stamps) can also be encoded orotherwise disposed in the spatial pattern 110. In some embodiments, forexample, a date disposed in the spatial pattern 110 can correspond to adate on which the inks 112, 114 are disposed on the substrate 102. Insome embodiments, a date can correspond to at least one of amanufacturing date of a product, a packaging date of a product, and anexpiration date of a product. Other dates can also be encoded in thespatial pattern 110 as desired.

The disclosed identification systems 100 have various uses. For example,in some embodiments, the identification system 100 can provideinformation (e.g., identifying information) about the spatial pattern110 or a product associated therewith. In some embodiments, informationcan be derived from the spatial pattern 110 at any time. In particular,evaluation and/or interpretation of the state of a characteristic of anink 112, 114 and/or the spatial pattern 110 at a given time (e.g., asecond time) can provide identifying information about the spatialpattern 110 and/or a product associated with the spatial pattern 110. Insome embodiments, a spatial pattern 110 can be evaluated to verify theauthenticity of a product. The identification system 100 can alsocomprise, or otherwise be configured as, a counterfeit protectionsystem.

In some embodiments, interpretation of the state of a characteristic ofthe spatial pattern 110 at a second time comprises a comparison betweenthe state of the characteristic of the spatial pattern 110 at the secondtime and the state of the characteristic of the spatial pattern 110 at afirst time. In other embodiments, interpretation of a characteristic ofthe spatial pattern 110 comprises a comparison between the state of thecharacteristic of the spatial pattern 110 at a second time and a controlimage of how the state of the characteristic of the spatial pattern 110should appear at the second time. In further embodiments, interpretationof the characteristic of the spatial pattern 110 comprises a comparisonbetween the state of the characteristic of the spatial pattern 110 at asecond time and a standard or control, such as an image or color. In yetother embodiments, interpretation of the state of the characteristic ofthe spatial pattern 110 at a second time comprises capturing an image ofthe spatial pattern 110 and submitting the image to a website. In someembodiments, the website can evaluate the spatial pattern 110 andprovide information about the spatial pattern 110 (e.g., the date onwhich the spatial pattern 110 was printed).

In some embodiments, interpretation of the characteristic of the spatialpattern 110 can be done by a human, for example, through a visualevaluation. For instance, one can visually compare the state of thecharacteristic of the spatial pattern 110 at a given time with astandard or control image of how the characteristic of the spatialpattern 110 should look at the given time. The standard or control imagecan be obtained, for example, from a website. In some embodiments, thevisual comparison is performed by merely looking at the spatial pattern110 and the standard or control image with the naked eye. Enhancementmechanisms can also be used, including, but not limited to, lenses,magnifiers, polarizing lenses, etc.

In other embodiments, interpretation of the characteristic of thespatial pattern 110 comprises an evaluation by a computing device,including, but not limited to, a smart phone. For example, one cancapture an image of the spatial pattern 110 with a computing device,such as a smart phone, and upload or otherwise submit the image to awebsite. The website can perform an evaluation of the image (e.g., bycomparing it to a control image or formula, etc.) and provideidentifying information about the spatial pattern 110. In someembodiments, the identifying information includes a date. The date cancorrespond to a date on which the spatial pattern 110 was disposed onthe substrate 102. The date can also correspond to at least one of amanufacturing date of the product, a packaging date of the product, andan expiration date of the product. In some embodiments, the date can beused to authenticate the product.

In some embodiments, the identifying information obtained from thespatial pattern 110 comprises encoded information that changes overtime, including, but not limited to, dosage related information. Forexample, in some embodiments, the spatial pattern 110 is disposed on asubstrate 102 that is associated with a pharmaceutical medication. Theefficacy, and thus recommended dosage, of the pharmaceutical medicationcan change over time as the medication ages. In such embodiments, thedosage information at any given time can be obtained by evaluating thespatial pattern 110. For example, evaluation of the state of acharacteristic of the spatial pattern 110 at a first time can indicate afirst dosage amount, and evaluation of the state of the characteristicof the spatial pattern 110 at a second time can indicate a second dosageamount. Further, evaluation of the state of the characteristic of thespatial pattern 110 at a third, fourth, fifth time, etc. can indicate athird, fourth, fifth dosage amount, etc. In some embodiments, therecommended dosage amount can change discontinuously, despite the stateof the characteristic changing continuously, e.g., for values of thestate of the characteristic between a first and a second value, thedosage is A, whereas for values of the state of the characteristicbetween the second and a third value, the dosage is B. As can beappreciated, the spatial pattern 110 can also be evaluated at any giventime to determine the age of the pharmaceutical medication.

In certain embodiments, the spatial pattern 110 can comprise encodedinformation about a website. For example, in some embodiments, thespatial pattern 110 comprises a QR code. The QR code can be configuredto direct a user to a particular website. In some embodiments, thespatial pattern 110 can change over time such that the QR code changes,and the user is directed to a different website. For example, the stateof a characteristic of a QR code at a first time can direct a user toone website, and the state of the characteristic of the QR code at asecond time can direct a user to another website, and so forth. Othertypes of information can also be encoded in the spatial pattern 110 asdesired.

FIGS. 2A-2B are schematic illustrations of an identification system 200,according to another embodiment of the present disclosure. As shown inFIGS. 2A-2B, the identification system 200 can comprise a plurality ofinks 212, 214 having time-dependent properties disposed in a spatialpattern 210 on a substrate 202. For example, the spatial pattern 210comprises a first time-dependent ink 212 and a second time-dependent ink214, which are analogous to the time-dependent inks 112, 114 disclosedabove in relation to FIGS. 1A-1B.

As further shown in FIGS. 2A-2B, in some embodiments, the identificationsystem 200 further comprises one or more reference inks 216. In someembodiments, the reference ink 216 can be used as a baseline reference,for example, in the interpretation of the spatial pattern 210. In someembodiments, the reference ink 216 can comprise a static ink that issubstantially devoid of time-dependent properties. As can beappreciated, however, static inks can still change to a minimal degreeover time, for example, due to aging of the ink 216 and/or the substrate202. Static inks can also change due to various environmentalconditions, including, but not limited to, humidity, temperature,pressure, etc. During or prior to evaluation of the spatial pattern 210,a static ink can be used (e.g., evaluated) to obtain a baseline fordetermining the changes that occurred to the time-dependent inks 212,214.

In other embodiments, the reference ink 216 can comprise, or be used as,a color reference. For example, the reference ink 216 can comprise acertain color that does not substantially change over time. The color ofthe reference ink 216 can be used to compare with time-dependent inks212, 214 that may change color to provide helpful information about theproduct.

In further embodiments, the reference ink 216 comprises a calibrationink. For example, the reference ink 216 can comprise temperaturecalibration inks Temperature calibration inks can comprise known time-and temperature-dependent properties. Temperature calibration inks canalso comprise known temperature coefficients. Temperature calibrationinks can also be used to differentiate changes due to temperature fromthose due to time.

Temperature-related information can be derived from the calibration inkin many ways. For example, a computing device can evaluate thecalibration at a second time and isolate temperature-related informationfrom the calibration ink. The temperature-related information can thenbe subtracted from the time-dependent inks 212, 214 to minimize theeffects of temperature on the changes to the time-dependent inks 212,214.

In certain embodiments, the reference ink 216 comprises one or moreanti-counterfeiting characteristics. Illustrative anti-counterfeitingcharacteristics include, but are not limited to, temperaturesensitivities, moisture sensitivities, radiation sensitivities, andpressure sensitivities. In some embodiments, the anti-counterfeitingcharacteristics can comprise a characteristic that changes upon exposureto an abnormal environmental condition, or a condition that extendsbeyond a certain threshold. For example, the reference ink 216 canchange upon exposure to a condition above or below a specifiedtemperature, moisture, radiation, and pressure. In such embodiments, thereference ink 216 can indicate whether the spatial pattern 210 has beentampered with, for example, if the ink 216 has been exposed to increasedtemperatures in an effort to alter the time-dependent properties of theinks 212, 214.

In certain embodiments, the reference ink 216 can comprise one or moreanti-counterfeiting characteristics that change upon exposure to acounterfeit detection test. For example, in some embodiments, a testcompound can be applied to the spatial pattern 210 to determine whetherthe spatial pattern 210 is authentic. Illustrative test compounds caninclude, but are not limited to, powders, liquids, solvents, solids, andother reagents. When applied to the reference ink 216, the test compoundcan cause the reference ink 216 to change, either temporarily orpermanently, to indicate the existence of the reference ink 216, anindication that the spatial pattern 210 is authentic. Upon exposure to afraudulent or counterfeit spatial pattern, the test compound may notreact, or may react differently, indicating that the spatial pattern andassociated identification system are fraudulent.

It will also be appreciated that in some embodiments, a time-dependentink 212, 214 can be used as a calibration ink, and/or ananti-counterfeiting ink, analogous to the reference ink 216 discussedabove. Thus, the discussion re calibration inks and anti-counterfeitinginks can be in relation to a reference ink 216, and/or a time-dependentink 212, 214.

FIGS. 3A-3B are schematic illustrations of an identification system 300,according to another embodiment of the disclosure. As shown in FIGS.3A-3B, the identification system 300 comprises a plurality of inks 312,314 having time-dependent properties disposed in a spatial pattern 310on a substrate 302. For example, the spatial pattern 310 comprises afirst time-dependent ink 312, and a second time-dependent ink 314, whichare analogous to the time-dependent inks 112, 114 disclosed above inrelation to FIGS. 1A-1B.

As further shown in FIGS. 3A-3B, in some embodiments, the characteristicof the ink 312, 314 that is affected by the time-dependent propertycomprises location, such as a spatial location in the spatial pattern310 on the substrate 302. For example, the ink 312, 314, or a portionthereof, can change locations over time, as shown in FIGS. 3A-3B. InFIG. 3A, the inks 312, 314 are disposed at one location at a first timeto form a first QR code, and in FIG. 3B, the inks 312, 314 are disposedat a different location at a second time to form a second QR code. Insuch embodiments, a portion of the spatial pattern 310 can be describedas being disposed at one location in a first state, and another locationin a second state.

In certain embodiments, the inks 312, 314 can migrate from one locationto another location on the substrate 302. U.S. Pat. No. 5,602,804,titled ‘Long Term Rapid Color Changing Time Indicator,’ filed Aug. 3,1995 and U.S. Pat. No. 5,822,280, titled ‘Long Term Rapid Color ChangingTime Indicator Employing Dye Absorbing Layer,’ filed May 6, 1996, eachof which is incorporated by reference in its entirety, describe twodifferent indicator systems based on migration of ink componentsrelative to a substrate. The inks 312, 314 can migrate over timerelatively quickly, or slowly, as desired. In some embodiments, the ink312, 314 migrates via wicking through the substrate 302. In furtherembodiments, the characteristic of the ink 312, 314 changes over timedue to migration of only a component of the ink 312, 314. For example, aliquid or aqueous component of the ink 312, 314 can migrate from onelocation to another, for example, by wicking through the substrate 302.In further embodiments, the characteristic of the ink 312, 314 changesfrom one state to another state because of migration of a component ofanother ink from one location to another. For example, a component ofthe second ink 314 can migrate and interact with a component of thefirst ink 312 in one location or another.

In some embodiments, the inks 312, 314 migrate at a different rate. Inother embodiments, the inks 312, 314 migrate at substantially similarrates. The rate of migration of the inks 312, 314 can also be variableor otherwise capable of being varied or changed. For example, the rateof migration of an ink 312, 314 can be configured to be relatively fast,or relatively slow, depending on the desired use of the identificationsystem 300.

The rate of migration of the ink 312, 314 can be varied by modifying oneor more components of the ink 312, 314. For example, one or morereagents or other compounds can be added that can accelerate ordecelerate the rate of migration. In some embodiments, the one or morecomponents of the ink 312, 314 can be modified prior to disposing theink 312, 314 on the substrate 302. In other embodiments, the one or morecomponents of the ink 312, 314 are modified while the ink 312, 314 isbeing disposed on the substrate 302. For example, one or more componentsof the ink 312, 314 can be mixed with additional reagents or compoundswhile the ink 312, 314 is being disposed on the substrate 302. In yetother embodiments, one or more components of the ink 312, 314 can bemodified after the ink 312, 314 has been disposed on the substrate 302.For example, a reagent or other compound can be applied to an ink 312,314 that has previously been disposed on a substrate 302.

As can be appreciated, varying the rate of migration of an ink 312, 314can vary the rate of change of a particular characteristic of the ink312, 314 and/or the spatial pattern 310. For example, increasing therate of migration of an ink 312, 314 can increase the rate of change ofa characteristic of the ink 312, 314 and/or the spatial pattern 310.Analogously, decreasing the rate of migration of an ink 312, 314 candecrease the rate of change of a characteristic of the ink 312, 314and/or the spatial pattern 310. In some embodiments, the rate ofmigration can be varied, or otherwise configured, such that acharacteristic of an ink 312, 314 and/or the spatial pattern 310 changesto a particular state on a predetermined date, for example, toauthenticate a product or indicate that an expiration date has passed.

As further shown in FIGS. 3A-3B, in some embodiments, the identificationsystem 300 further comprises one or more reference inks 316. Asdiscussed above, the reference ink 316 can be used as a baselinereference for interpretation of the spatial pattern 310. In someembodiments, the reference ink 316 can be a non-migrating ink, such thatit remains disposed in one location while the time-dependent inks 312,314 move over time.

In some embodiments, the spatial pattern 310 changes such that it candirect a user to a particular website at a particular time. For example,as shown in FIGS. 3A-3B, the spatial pattern 310 can comprise a QR code.In FIG. 3A, the spatial pattern 310 is disposed in a first QR code andcan direct a user to one website, and in FIG. 3B, the spatial pattern310 is disposed in a second QR code and can direct a user to a differentwebsite.

FIG. 4 is a schematic illustration of an identification system 400,according to another embodiment of the disclosure. As shown in FIG. 4,the identification system 400 comprises a plurality of inks 412, 414having time-dependent properties disposed in a spatial pattern 410 on asubstrate 402. For example, the spatial pattern 410 comprises a firsttime-dependent ink 412, and a second time-dependent ink 414, which areanalogous to the time-dependent inks 112, 114 disclosed above inrelation to FIGS. 1A-1B. In some embodiments, the spatial pattern 410further comprises a third time-dependent ink 416, which can also beanalogous to the time-dependent inks 112, 114 disclosed above inrelation to FIGS. 1A-1B. In some embodiments, such as the illustratedembodiment of FIG. 4, the identification system 400 further comprises areference ink 418 that is substantially devoid of time-dependentproperties.

FIGS. 5A-5B are schematic illustrations of an identification system 500,according to another embodiment of the disclosure. As shown in FIGS.5A-5B, the identification system 500 comprises a plurality of inks 512,514 having time-dependent properties disposed in a spatial pattern 510on a substrate 502. For example, the spatial pattern 510 comprises afirst time-dependent ink 512, and a second time-dependent ink 514, whichare analogous to the time-dependent inks 112, 114 disclosed above inrelation to FIGS. 1A-1B.

As shown in FIGS. 5A-5B, various types of spatial patterns 510 can beemployed. For example, in FIGS. 1A-1B, 2A-2B, 3A-3B, and 4, the spatialpatterns 110, 210, 310, 410 were generally in the form of a QR code. InFIGS. 5A-5B, the spatial pattern 510 can be representative of anotherbarcode, an image, an icon, or another type of spatial pattern 510.

Further, as shown in FIGS. 5A-5B, the first and second inks 512, 514 canmigrate over time. For example, in FIG. 5A, a first ink 512 (or aportion thereof) is disposed at a first location 522, and a second ink514 (or a portion thereof) is disposed at a second location 526. Asindicated by the reference arrows, D1 and D2, the inks 512, 514 (orportions thereof) can migrate over time to a different location on thesubstrate 502, as illustrated in FIG. 5B. In FIG. 5B, the first ink 512(or a portion thereof) has moved to a new location 524, and the secondink 514 (or a portion thereof) has moved to a new location 528. In someembodiments, the distance the inks 512, 514 have moved can be evaluatedto determine information about the spatial pattern 510, e.g.,information such as the date on which the spatial pattern 510 wasdisposed on the substrate 502.

FIGS. 6A-6B are schematic illustrations of an identification system 600,according to another embodiment of the disclosure. As shown in FIGS.6A-6B, the identification system 600 comprises a plurality of inks 612,614 having time-dependent properties disposed in a spatial pattern 610on a substrate 602. For example, the spatial pattern 610 comprises afirst time-dependent ink 612, and a second time-dependent ink 614, whichare analogous to the time-dependent inks 112, 114 disclosed above inrelation to FIGS. 1A-1B. The spatial pattern 610 further comprises areference ink 616 that is substantially devoid of time-dependentproperties.

As shown in FIG. 6A, in some embodiments, the first and second inks 612,614 can be disposed at a substantially similar location 622 on thesubstrate 602. Further, one or more of the inks 612, 614 can beconfigured to migrate over time, as indicated by the reference arrow D3.In FIG. 6B, the second ink 614 has migrated to a new location 624 at asecond time such that it is no longer disposed in the same spatiallocation as the first ink 612. An evaluation of the inks 612, 614 canthen provide identifying information about the spatial pattern 610.

Methods for labeling a substrate with an identification system are alsoprovided herein. In particular, it is contemplated that any of thecomponents, principles, and/or embodiments discussed above may beutilized by either a system or a method. For example, in an embodiment,a method for labeling a substrate may comprise a step of disposing afirst ink comprising a time-dependent property and a second inkcomprising a time-dependent property onto the substrate, wherein thefirst and second inks are disposed onto the substrate to form a spatialpattern. The time-dependent property of the first ink and thetime-dependent property of the second ink can cause a characteristic ofthe spatial pattern to change from a first state at a first time to asecond state at a second time. Further, in some embodiments, thecharacteristic of the spatial pattern in the second state can provideidentifying information about the spatial pattern and/or a productassociated with the spatial pattern. Additional steps, and/or methods,can also be employed.

Reference throughout this specification to “an embodiment” or “theembodiment” means that a particular feature, structure, orcharacteristic described in connection with that embodiment is includedin at least one embodiment. Thus, the quoted phrases, or variationsthereof, as recited throughout this specification are not necessarilyall referring to the same embodiment.

Similarly, it should be appreciated that in the above description ofembodiments, various features are sometimes grouped together in a singleembodiment, figure, or description thereof for the purpose ofstreamlining the disclosure. This method of disclosure, however, is notto be interpreted as reflecting an intention that any claim require morefeatures than those expressly recited in that claim. Rather, as thefollowing claims reflect, inventive aspects lie in a combination offewer than all features of any single foregoing disclosed embodiment.

The claims following this written disclosure are hereby expresslyincorporated into the present written disclosure, with each claimstanding on its own as a separate embodiment. This disclosure includesall permutations of the independent claims with their dependent claims.Moreover, additional embodiments capable of derivation from theindependent and dependent claims that follow are also expresslyincorporated into the present written description.

While various aspects and embodiments have been disclosed herein, otheraspects and embodiments will be apparent to those skilled in the art.The various aspects and embodiments disclosed herein are for purposes ofillustration and are not intended to be limiting, with the true scopeand spirit being indicated by the following claims.

What is claimed is:
 1. An identification system, comprising: a first inkcomprising a time-dependent property having a rate of progression; and asecond ink comprising a time-dependent property having a rate ofprogression; the first ink and the second ink being disposed in aspatial pattern on a substrate; wherein the time-dependent property ofthe first ink and the time-dependent property of the second ink cause acharacteristic of the spatial pattern to change from a first state at afirst time to a second state at a second time, with a plurality ofintermediate states that occur at corresponding intermediate timesbetween the first time and the second time; wherein interpretation ofthe characteristic of the spatial pattern in any of the first state, theplurality of intermediate states, and the second state providesidentifying information about a product.
 2. The system of claim 1,wherein the rate of progression of the time-dependent property of thefirst ink differs from the rate of progression of the time-dependentproperty of the second ink.
 3. The system of claim 1, wherein thetime-dependent property of the first ink causes a characteristic of thefirst ink to change from a third state at the first time to a fourthstate at the second time, and wherein the time-dependent property of thesecond ink causes a characteristic of the second ink to change from afifth state at the first time to a sixth state at the second time. 4.The system of claim 3, wherein the characteristic of the first inkcomprises at least one of color, reflectivity, and location.
 5. Thesystem of claim 4, wherein the characteristic of the second inkcomprises at least one of color, reflectivity, and location.
 6. Thesystem of claim 3, wherein the characteristic of the first ink changesfrom the third state to the fourth state because of an atmosphericreaction comprising a component of the first ink.
 7. The system of claim3, wherein the characteristic of the first ink changes from the thirdstate to the fourth state because of a chemical reaction comprising acomponent of the first ink.
 8. The system of claim 1, wherein thespatial pattern comprises a pattern selected from the group consistingof a barcode, a one-dimensional barcode, a two-dimensional barcode, alinear barcode, a universal product code, a matrix barcode, a quickresponse code, text, and an icon.
 9. The system of claim 1, wherein adate is encoded in the spatial pattern.
 10. The system of claim 1,wherein interpretation of the characteristic of the spatial pattern inany of the intermediate states and the second state comprises anevaluation of the spatial pattern in any of the intermediate states andthe second state and a determination of whether the spatial pattern isauthentic.
 11. The system of claim 1, wherein interpretation of thecharacteristic of the spatial pattern in any of the intermediate statesand the second state comprises a comparison between the characteristicof the spatial pattern in any of the intermediate states and the secondstate and the characteristic of the spatial pattern in the first state.12. The system of claim 1, wherein interpretation of the characteristicof the spatial pattern in any of the intermediate states and the secondstate comprises a comparison between the characteristic of the spatialpattern in any of the intermediate states and the second state and acontrol image of how the characteristic of the spatial pattern shouldappear at the second time.
 13. The system of claim 1, whereininterpretation of the characteristic of the spatial pattern in any ofthe intermediate states and the second state comprises a comparisonbetween the characteristic of the spatial pattern in any of theintermediate states and the second state and a standard.
 14. The systemof claim 1, wherein interpretation of the characteristic of the spatialpattern in any of the intermediate states and the second state comprisesan evaluation by a computing device.
 15. The system of claim 14, whereinevaluation by a computing device comprises capturing an image of thespatial pattern in any of the intermediate states and the second stateand submitting the image to a website.
 16. The system of claim 1,wherein the identifying information comprises encoded information thatchanges between the first time, the intermediate states and the secondtime.
 17. The system of claim 16, wherein the encoded informationcomprises dosage-related information.
 18. The system of claim 1, furthercomprising: one or more reference inks disposed in the spatial pattern.19. The system of claim 18, wherein a reference ink comprises a staticink that is substantially devoid of time-dependent properties.
 20. Thesystem of claim 18, wherein a reference ink provides a baselinereference for the interpretation of the characteristic of the spatialpattern in any of the intermediate states and the second state.
 21. Thesystem of claim 18, wherein one or more reference inks comprise ananti-counterfeiting characteristic.
 22. A method of labeling asubstrate, comprising: disposing a first ink comprising a time-dependentproperty having a rate of progression onto the substrate; and disposinga second ink comprising a time-dependent property having a rate ofprogression onto the substrate; wherein the first ink and the second inkare disposed onto the substrate to form a spatial pattern; wherein thetime-dependent property of the first ink and the time-dependent propertyof the second ink cause a characteristic of the spatial pattern tochange from a first state at a first time to a second state at a secondtime, with a plurality of intermediate states that occur atcorresponding intermediate times between the first time and the secondtime; wherein the characteristic of the spatial pattern in any of thefirst state, the plurality of intermediate states, and the second stateprovides identifying information about a product.
 23. The method ofclaim 22, wherein the rate of progression of the time-dependent propertyof the first ink differs from the rate of progression of thetime-dependent property of the second ink.
 24. The method of claim 22,wherein the time-dependent property of the first ink causes acharacteristic of the first ink to change from a third state at thefirst time to a fourth state at the second time, and wherein thetime-dependent property of the second ink causes a characteristic of thesecond ink to change from a fifth state at the first time to a sixthstate at the second time.
 25. The method of claim 24, wherein thecharacteristic of the first ink comprises at least one of color,reflectivity, and location.
 26. The method of claim 25, wherein thecharacteristic of the second ink comprises at least one of color,reflectivity, and location.
 27. The method of claim 24, wherein thecharacteristic of the first ink changes from the third state to thefourth state because of an atmospheric reaction comprising a componentof the first ink.
 28. The method of claim 24, wherein the characteristicof the first ink changes from the third state to the fourth statebecause of a chemical reaction comprising a component of the first ink.29. The method of claim 22, wherein the spatial pattern comprises apattern selected from the group consisting of a barcode, aone-dimensional barcode, a two-dimensional barcode, a linear barcode, auniversal product code, a matrix barcode, a quick response code, text,and an icon.
 30. The method of claim 22, wherein a date is encoded inthe spatial pattern.
 31. The method of claim 22, wherein the identifyinginformation is determined by evaluating the characteristic of thespatial pattern in the second state.
 32. The method of claim 22, whereinthe identifying information is determined by comparing thecharacteristic of the spatial pattern in any of the intermediate statesand the second state with the characteristic of the spatial pattern inthe first state.
 33. The method of claim 22, wherein the identifyinginformation is determined by comparing the characteristic of the spatialpattern in any of the intermediate states and the second state with acontrol image of how the characteristic of the spatial pattern shouldappear in the second state.
 34. The method of claim 22, wherein theidentifying information is determined by comparing the characteristic ofthe spatial pattern in any of the intermediate states and the secondstate with a standard.
 35. The method of claim 22, wherein theidentifying information is determined by evaluating the characteristicof the spatial pattern in any of the intermediate states and the secondstate with a computing device.
 36. The method of claim 35, whereinevaluation by a computing device comprises capturing an image of thespatial pattern in any of the intermediate states and the second stateand submitting the image to a website.
 37. The method of claim 22,wherein the identifying information comprises encoded information thatchanges between the first time, the intermediate states and the secondtime.
 38. The method of claim 37, wherein the encoded informationcomprises dosage-related information.
 39. The method of claim 22,further comprising: disposing one or more reference inks in the spatialpattern.
 40. The method of claim 39, wherein a reference ink comprises astatic ink that is substantially devoid of time-dependent properties.41. The method of claim 39, wherein a reference ink provides a baselinereference for the interpretation of the characteristic of the spatialpattern in any of the intermediate states and the second state.
 42. Themethod of claim 39, wherein one or more reference inks comprise ananti-counterfeiting characteristic.